﻿using System;

class AssignNullValues
{
    static void Main()
    {
        int? firstNulllValue = null;
        double? secondNulllValue = null;
        Console.WriteLine(firstNulllValue);
        Console.WriteLine(secondNulllValue);
        Console.WriteLine(firstNulllValue + 1);
        Console.WriteLine(secondNulllValue + 2);
    }
}